using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Routing;
using StellaOps.Platform.WebService.Constants;
using StellaOps.Platform.WebService.Contracts;
using StellaOps.Platform.WebService.Services;
using System;
using System.Threading;
using System.Threading.Tasks;

namespace StellaOps.Platform.WebService.Endpoints;

public static class ReleaseReadModelEndpoints
{
    public static IEndpointRouteBuilder MapReleaseReadModelEndpoints(this IEndpointRouteBuilder app)
    {
        var releases = app.MapGroup("/api/v2/releases")
            .WithTags("Releases V2")
            .RequireAuthorization(PlatformPolicies.ReleaseControlRead);

        releases.MapGet(string.Empty, async Task<IResult>(
            HttpContext context,
            PlatformRequestContextResolver resolver,
            ReleaseReadModelService service,
            TimeProvider timeProvider,
            [AsParameters] ReleaseListQuery query,
            CancellationToken cancellationToken) =>
        {
            if (!TryResolveContext(context, resolver, out var requestContext, out var failure))
            {
                return failure!;
            }

            var page = await service.ListReleasesAsync(
                requestContext!,
                query.Region,
                query.Environment,
                query.Type,
                query.Status,
                query.Limit,
                query.Offset,
                cancellationToken).ConfigureAwait(false);

            return Results.Ok(new PlatformListResponse<ReleaseProjection>(
                requestContext!.TenantId,
                requestContext.ActorId,
                timeProvider.GetUtcNow(),
                Cached: false,
                CacheTtlSeconds: 0,
                page.Items,
                page.Total,
                page.Limit,
                page.Offset));
        })
        .WithName("ListReleasesV2")
        .WithSummary("List Pack-22 release projections")
        .RequireAuthorization(PlatformPolicies.ReleaseControlRead);

        releases.MapGet("/{releaseId:guid}", async Task<IResult>(
            HttpContext context,
            PlatformRequestContextResolver resolver,
            ReleaseReadModelService service,
            TimeProvider timeProvider,
            Guid releaseId,
            CancellationToken cancellationToken) =>
        {
            if (!TryResolveContext(context, resolver, out var requestContext, out var failure))
            {
                return failure!;
            }

            var detail = await service.GetReleaseDetailAsync(
                requestContext!,
                releaseId,
                cancellationToken).ConfigureAwait(false);
            if (detail is null)
            {
                return Results.NotFound(new { error = "release_not_found", releaseId });
            }

            return Results.Ok(new PlatformItemResponse<ReleaseDetailProjection>(
                requestContext!.TenantId,
                requestContext.ActorId,
                timeProvider.GetUtcNow(),
                Cached: false,
                CacheTtlSeconds: 0,
                detail));
        })
        .WithName("GetReleaseDetailV2")
        .WithSummary("Get Pack-22 release detail projection")
        .RequireAuthorization(PlatformPolicies.ReleaseControlRead);

        releases.MapGet("/activity", async Task<IResult>(
            HttpContext context,
            PlatformRequestContextResolver resolver,
            ReleaseReadModelService service,
            TimeProvider timeProvider,
            [AsParameters] ReleaseActivityQuery query,
            CancellationToken cancellationToken) =>
        {
            if (!TryResolveContext(context, resolver, out var requestContext, out var failure))
            {
                return failure!;
            }

            var page = await service.ListActivityAsync(
                requestContext!,
                query.Region,
                query.Environment,
                query.Limit,
                query.Offset,
                cancellationToken).ConfigureAwait(false);

            return Results.Ok(new PlatformListResponse<ReleaseActivityProjection>(
                requestContext!.TenantId,
                requestContext.ActorId,
                timeProvider.GetUtcNow(),
                Cached: false,
                CacheTtlSeconds: 0,
                page.Items,
                page.Total,
                page.Limit,
                page.Offset));
        })
        .WithName("ListReleaseActivityV2")
        .WithSummary("List cross-release activity timeline")
        .RequireAuthorization(PlatformPolicies.ReleaseControlRead);

        releases.MapGet("/approvals", async Task<IResult>(
            HttpContext context,
            PlatformRequestContextResolver resolver,
            ReleaseReadModelService service,
            TimeProvider timeProvider,
            [AsParameters] ReleaseApprovalsQuery query,
            CancellationToken cancellationToken) =>
        {
            if (!TryResolveContext(context, resolver, out var requestContext, out var failure))
            {
                return failure!;
            }

            var page = await service.ListApprovalsAsync(
                requestContext!,
                query.Status,
                query.Region,
                query.Environment,
                query.Limit,
                query.Offset,
                cancellationToken).ConfigureAwait(false);

            return Results.Ok(new PlatformListResponse<ReleaseApprovalProjection>(
                requestContext!.TenantId,
                requestContext.ActorId,
                timeProvider.GetUtcNow(),
                Cached: false,
                CacheTtlSeconds: 0,
                page.Items,
                page.Total,
                page.Limit,
                page.Offset));
        })
        .WithName("ListReleaseApprovalsV2")
        .WithSummary("List cross-release approvals queue projection")
        .RequireAuthorization(PlatformPolicies.ReleaseControlRead);

        var runs = releases.MapGroup("/runs");

        runs.MapGet(string.Empty, async Task<IResult>(
            HttpContext context,
            PlatformRequestContextResolver resolver,
            ReleaseReadModelService service,
            TimeProvider timeProvider,
            [AsParameters] ReleaseRunListQuery query,
            CancellationToken cancellationToken) =>
        {
            if (!TryResolveContext(context, resolver, out var requestContext, out var failure))
            {
                return failure!;
            }

            var page = await service.ListRunsAsync(
                requestContext!,
                query.Status,
                query.Lane,
                query.Environment,
                query.Region,
                query.Outcome,
                query.NeedsApproval,
                query.BlockedByDataIntegrity,
                query.Limit,
                query.Offset,
                cancellationToken).ConfigureAwait(false);

            return Results.Ok(new PlatformListResponse<ReleaseRunProjection>(
                requestContext!.TenantId,
                requestContext.ActorId,
                timeProvider.GetUtcNow(),
                Cached: false,
                CacheTtlSeconds: 0,
                page.Items,
                page.Total,
                page.Limit,
                page.Offset));
        })
        .WithName("ListReleaseRunsV2")
        .WithSummary("List run-centric release projections for Pack-22 contracts")
        .RequireAuthorization(PlatformPolicies.ReleaseControlRead);

        runs.MapGet("/{runId:guid}", async Task<IResult>(
            HttpContext context,
            PlatformRequestContextResolver resolver,
            ReleaseReadModelService service,
            TimeProvider timeProvider,
            Guid runId,
            CancellationToken cancellationToken) =>
        {
            if (!TryResolveContext(context, resolver, out var requestContext, out var failure))
            {
                return failure!;
            }

            var item = await service.GetRunDetailAsync(requestContext!, runId, cancellationToken).ConfigureAwait(false);
            return item is null
                ? Results.NotFound(new { error = "run_not_found", runId })
                : Results.Ok(new PlatformItemResponse<ReleaseRunDetailProjection>(
                    requestContext!.TenantId,
                    requestContext.ActorId,
                    timeProvider.GetUtcNow(),
                    Cached: false,
                    CacheTtlSeconds: 0,
                    item));
        })
        .WithName("GetReleaseRunDetailV2")
        .WithSummary("Get canonical release run detail projection")
        .RequireAuthorization(PlatformPolicies.ReleaseControlRead);

        runs.MapGet("/{runId:guid}/timeline", async Task<IResult>(
            HttpContext context,
            PlatformRequestContextResolver resolver,
            ReleaseReadModelService service,
            TimeProvider timeProvider,
            Guid runId,
            CancellationToken cancellationToken) =>
        {
            if (!TryResolveContext(context, resolver, out var requestContext, out var failure))
            {
                return failure!;
            }

            var item = await service.GetRunTimelineAsync(requestContext!, runId, cancellationToken).ConfigureAwait(false);
            return item is null
                ? Results.NotFound(new { error = "run_not_found", runId })
                : Results.Ok(new PlatformItemResponse<ReleaseRunTimelineProjection>(
                    requestContext!.TenantId,
                    requestContext.ActorId,
                    timeProvider.GetUtcNow(),
                    Cached: false,
                    CacheTtlSeconds: 0,
                    item));
        })
        .WithName("GetReleaseRunTimelineV2")
        .WithSummary("Get release run timeline projection")
        .RequireAuthorization(PlatformPolicies.ReleaseControlRead);

        runs.MapGet("/{runId:guid}/gate-decision", async Task<IResult>(
            HttpContext context,
            PlatformRequestContextResolver resolver,
            ReleaseReadModelService service,
            TimeProvider timeProvider,
            Guid runId,
            CancellationToken cancellationToken) =>
        {
            if (!TryResolveContext(context, resolver, out var requestContext, out var failure))
            {
                return failure!;
            }

            var item = await service.GetRunGateDecisionAsync(requestContext!, runId, cancellationToken).ConfigureAwait(false);
            return item is null
                ? Results.NotFound(new { error = "run_not_found", runId })
                : Results.Ok(new PlatformItemResponse<ReleaseRunGateDecisionProjection>(
                    requestContext!.TenantId,
                    requestContext.ActorId,
                    timeProvider.GetUtcNow(),
                    Cached: false,
                    CacheTtlSeconds: 0,
                    item));
        })
        .WithName("GetReleaseRunGateDecisionV2")
        .WithSummary("Get release run gate decision projection")
        .RequireAuthorization(PlatformPolicies.ReleaseControlRead);

        runs.MapGet("/{runId:guid}/approvals", async Task<IResult>(
            HttpContext context,
            PlatformRequestContextResolver resolver,
            ReleaseReadModelService service,
            TimeProvider timeProvider,
            Guid runId,
            CancellationToken cancellationToken) =>
        {
            if (!TryResolveContext(context, resolver, out var requestContext, out var failure))
            {
                return failure!;
            }

            var item = await service.GetRunApprovalsAsync(requestContext!, runId, cancellationToken).ConfigureAwait(false);
            return item is null
                ? Results.NotFound(new { error = "run_not_found", runId })
                : Results.Ok(new PlatformItemResponse<ReleaseRunApprovalsProjection>(
                    requestContext!.TenantId,
                    requestContext.ActorId,
                    timeProvider.GetUtcNow(),
                    Cached: false,
                    CacheTtlSeconds: 0,
                    item));
        })
        .WithName("GetReleaseRunApprovalsV2")
        .WithSummary("Get release run approvals checkpoints projection")
        .RequireAuthorization(PlatformPolicies.ReleaseControlRead);

        runs.MapGet("/{runId:guid}/deployments", async Task<IResult>(
            HttpContext context,
            PlatformRequestContextResolver resolver,
            ReleaseReadModelService service,
            TimeProvider timeProvider,
            Guid runId,
            CancellationToken cancellationToken) =>
        {
            if (!TryResolveContext(context, resolver, out var requestContext, out var failure))
            {
                return failure!;
            }

            var item = await service.GetRunDeploymentsAsync(requestContext!, runId, cancellationToken).ConfigureAwait(false);
            return item is null
                ? Results.NotFound(new { error = "run_not_found", runId })
                : Results.Ok(new PlatformItemResponse<ReleaseRunDeploymentsProjection>(
                    requestContext!.TenantId,
                    requestContext.ActorId,
                    timeProvider.GetUtcNow(),
                    Cached: false,
                    CacheTtlSeconds: 0,
                    item));
        })
        .WithName("GetReleaseRunDeploymentsV2")
        .WithSummary("Get release run deployments projection")
        .RequireAuthorization(PlatformPolicies.ReleaseControlRead);

        runs.MapGet("/{runId:guid}/security-inputs", async Task<IResult>(
            HttpContext context,
            PlatformRequestContextResolver resolver,
            ReleaseReadModelService service,
            TimeProvider timeProvider,
            Guid runId,
            CancellationToken cancellationToken) =>
        {
            if (!TryResolveContext(context, resolver, out var requestContext, out var failure))
            {
                return failure!;
            }

            var item = await service.GetRunSecurityInputsAsync(requestContext!, runId, cancellationToken).ConfigureAwait(false);
            return item is null
                ? Results.NotFound(new { error = "run_not_found", runId })
                : Results.Ok(new PlatformItemResponse<ReleaseRunSecurityInputsProjection>(
                    requestContext!.TenantId,
                    requestContext.ActorId,
                    timeProvider.GetUtcNow(),
                    Cached: false,
                    CacheTtlSeconds: 0,
                    item));
        })
        .WithName("GetReleaseRunSecurityInputsV2")
        .WithSummary("Get release run security inputs projection")
        .RequireAuthorization(PlatformPolicies.ReleaseControlRead);

        runs.MapGet("/{runId:guid}/evidence", async Task<IResult>(
            HttpContext context,
            PlatformRequestContextResolver resolver,
            ReleaseReadModelService service,
            TimeProvider timeProvider,
            Guid runId,
            CancellationToken cancellationToken) =>
        {
            if (!TryResolveContext(context, resolver, out var requestContext, out var failure))
            {
                return failure!;
            }

            var item = await service.GetRunEvidenceAsync(requestContext!, runId, cancellationToken).ConfigureAwait(false);
            return item is null
                ? Results.NotFound(new { error = "run_not_found", runId })
                : Results.Ok(new PlatformItemResponse<ReleaseRunEvidenceProjection>(
                    requestContext!.TenantId,
                    requestContext.ActorId,
                    timeProvider.GetUtcNow(),
                    Cached: false,
                    CacheTtlSeconds: 0,
                    item));
        })
        .WithName("GetReleaseRunEvidenceV2")
        .WithSummary("Get release run evidence capsule projection")
        .RequireAuthorization(PlatformPolicies.ReleaseControlRead);

        runs.MapGet("/{runId:guid}/rollback", async Task<IResult>(
            HttpContext context,
            PlatformRequestContextResolver resolver,
            ReleaseReadModelService service,
            TimeProvider timeProvider,
            Guid runId,
            CancellationToken cancellationToken) =>
        {
            if (!TryResolveContext(context, resolver, out var requestContext, out var failure))
            {
                return failure!;
            }

            var item = await service.GetRunRollbackAsync(requestContext!, runId, cancellationToken).ConfigureAwait(false);
            return item is null
                ? Results.NotFound(new { error = "run_not_found", runId })
                : Results.Ok(new PlatformItemResponse<ReleaseRunRollbackProjection>(
                    requestContext!.TenantId,
                    requestContext.ActorId,
                    timeProvider.GetUtcNow(),
                    Cached: false,
                    CacheTtlSeconds: 0,
                    item));
        })
        .WithName("GetReleaseRunRollbackV2")
        .WithSummary("Get release run rollback projection")
        .RequireAuthorization(PlatformPolicies.ReleaseControlRead);

        runs.MapGet("/{runId:guid}/replay", async Task<IResult>(
            HttpContext context,
            PlatformRequestContextResolver resolver,
            ReleaseReadModelService service,
            TimeProvider timeProvider,
            Guid runId,
            CancellationToken cancellationToken) =>
        {
            if (!TryResolveContext(context, resolver, out var requestContext, out var failure))
            {
                return failure!;
            }

            var item = await service.GetRunReplayAsync(requestContext!, runId, cancellationToken).ConfigureAwait(false);
            return item is null
                ? Results.NotFound(new { error = "run_not_found", runId })
                : Results.Ok(new PlatformItemResponse<ReleaseRunReplayProjection>(
                    requestContext!.TenantId,
                    requestContext.ActorId,
                    timeProvider.GetUtcNow(),
                    Cached: false,
                    CacheTtlSeconds: 0,
                    item));
        })
        .WithName("GetReleaseRunReplayV2")
        .WithSummary("Get release run replay projection")
        .RequireAuthorization(PlatformPolicies.ReleaseControlRead);

        runs.MapGet("/{runId:guid}/audit", async Task<IResult>(
            HttpContext context,
            PlatformRequestContextResolver resolver,
            ReleaseReadModelService service,
            TimeProvider timeProvider,
            Guid runId,
            CancellationToken cancellationToken) =>
        {
            if (!TryResolveContext(context, resolver, out var requestContext, out var failure))
            {
                return failure!;
            }

            var item = await service.GetRunAuditAsync(requestContext!, runId, cancellationToken).ConfigureAwait(false);
            return item is null
                ? Results.NotFound(new { error = "run_not_found", runId })
                : Results.Ok(new PlatformItemResponse<ReleaseRunAuditProjection>(
                    requestContext!.TenantId,
                    requestContext.ActorId,
                    timeProvider.GetUtcNow(),
                    Cached: false,
                    CacheTtlSeconds: 0,
                    item));
        })
        .WithName("GetReleaseRunAuditV2")
        .WithSummary("Get release run audit projection")
        .RequireAuthorization(PlatformPolicies.ReleaseControlRead);

        return app;
    }

    private static bool TryResolveContext(
        HttpContext context,
        PlatformRequestContextResolver resolver,
        out PlatformRequestContext? requestContext,
        out IResult? failure)
    {
        if (resolver.TryResolve(context, out requestContext, out var error))
        {
            failure = null;
            return true;
        }

        failure = Results.BadRequest(new { error = error ?? "tenant_missing" });
        return false;
    }

    public sealed record ReleaseListQuery(
        string? Region,
        string? Environment,
        string? Type,
        string? Status,
        int? Limit,
        int? Offset);

    public sealed record ReleaseActivityQuery(
        string? Region,
        string? Environment,
        int? Limit,
        int? Offset);

    public sealed record ReleaseApprovalsQuery(
        string? Status,
        string? Region,
        string? Environment,
        int? Limit,
        int? Offset);

    public sealed record ReleaseRunListQuery(
        string? Status,
        string? Lane,
        string? Environment,
        string? Region,
        string? Outcome,
        bool? NeedsApproval,
        bool? BlockedByDataIntegrity,
        int? Limit,
        int? Offset);
}